[ios clean] Toolbar displays total number of tabs.

ios/clean/chrome/browser/ui/toolbar/toolbar_mediator.h

Index: ios/clean/chrome/browser/ui/toolbar/toolbar_mediator.h
diff --git a/ios/clean/chrome/browser/ui/toolbar/toolbar_mediator.h b/ios/clean/chrome/browser/ui/toolbar/toolbar_mediator.h
index 2afe96d3c03f66e2fd448f3a5a6e7bef38d584f7..6cdd4d8ee655e36ee891bfddc3ef718b4809da25 100644
--- a/ios/clean/chrome/browser/ui/toolbar/toolbar_mediator.h
+++ b/ios/clean/chrome/browser/ui/toolbar/toolbar_mediator.h
@@ -12,6 +12,7 @@
 namespace web {
 class WebState;
 }
+class WebStateList;
 
 // A mediator object that provides the relevant properties of a web state
 // to a consumer.
@@ -21,10 +22,17 @@ class WebState;
 // the lifetime of this object and may be null.
 @property(nonatomic, assign) web::WebState* webState;

[edchin, 2017/05/27 16:25:06]

Perhaps in another CL:
This webState should be taken off the public interface 
since you're now able to listen to active WS updates
from the WSL. 

[sczs, 2017/05/30 00:18:21]

Thanks for pointing this out! Will follow the Phantom browsers discussion and
update this if necessary. 

 
+// The WebStateList that this mediator listens for any changes on the total
+// number of Webstates.
+@property(nonatomic, assign) WebStateList* webStateList;
+
 // The consumer for this object. This can change during the lifetime of this
 // object and may be nil.
 @property(nonatomic, strong) id<ToolbarConsumer> consumer;
 
+// Stops observing all objects.
+- (void)disconnect;
+
 @end
 
 #endif  // IOS_CLEAN_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_MEDIATOR_H_